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All-Carbon negative differential resistance nanodevice using a single flake of nanoporous graphene

Rahighi, R ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1021/acsaelm.1c00396
  3. Publisher: American Chemical Society , 2021
  4. Abstract:
  5. A temperature-induced degenerate p-type graphene nanopore/reduced graphene oxide (GNP/rGO) heterojunction-based nanodevice was prepared and studied for the first time, showing a robust negative differential resistance (NDR) feature. In this regard, cellulose-based perforated graphene foams (PGFs), containing numerous nanopores (with an average size of ∼2 nm surrounded by nearly six-layer rGO walls) were synthesized using bagasse as a green starting material. The PGFs with an essential p-type semiconducting property showed a band gap energy of ∼1.8 eV. The observed two-terminal NDR peak could present stable and reversible features at high temperatures of 586-592 K. It was demonstrated that the O2 gas of the ambient would be involved in a crucial activity in water-based degeneration of the initial p-type regions around the GNPs and, consequently, the appearance of an intensive quantum tunneling NDR peak. An electron-band structure-based mechanism is proposed to describe the lateral quantum tunneling current within the degenerate p-type GNP and rGO heterojunction that is induced by the energized water molecules (EWMs). These results can shed light on more investigations regarding lateral quantum tunneling-based NDR features in upcoming and highly desired two-dimensional electronic nanodevices. ©
  6. Keywords:
  7. Electron tunneling ; Energy gap ; Heterojunctions ; Nanopores ; Negative resistance ; Reduced Graphene Oxide ; Electron band structures ; Electronic nanodevices ; Green starting material ; High temperature ; Negative differential resistances ; Quantum tunneling ; Semi-conducting property ; Temperature-induced ; Graphene ; Bagasse ; Bands ; Light ; Molecules ; Resistance ; Type ; Water
  8. Source: ACS Applied Electronic Materials ; Volume 3, Issue 8 , 2021 , Pages 3418-3427 ; 26376113 (ISSN)
  9. URL: https://pubs.acs.org/doi/10.1021/acsaelm.1c00396